Please Planting tin net agian the chip foot, the temperature of the hot air gun is controlled within 250 degrees too high temperature is easy to make the product deformed, secure with tweezers planting tin net, aaply the solder paste evenly, make sure than each hole is covered with solder paste, clean the surface of the steel net with a clean cloth, then blow and weld the ball with a hot air gun, after cooling slightly the steel net tube is separated from the chip.

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